Low Or No Rx Injection Signal (136-174 Mhz); Figure 5-11. Low Or No Rx Injection Signal (136-174 Mhz) - Motorola ASTRO Digital XTL 5000 Detailed Service Manual
Vhf,
uhf range 1 and 2
700–800 mhz
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Also See for ASTRO Digital XTL 5000:
- Basic service manual (199 pages) ,
- User manual (162 pages) ,
- Instruction manual (38 pages)
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Troubleshooting Charts: Flowcharts
5.6.7
Low or No RX Injection Signal (136–174 MHz)
START
Low or No RX
Injection Signal
on TP6771
Approx.
7.5V on
R3800/R3801
?
Approx.
7.5V on
R3872/Q3768
?
Approx.
9V on
C3069/L3775
?
Check components
between Q3762
and TP6771
6881096C74-B
Check Q3761 and
No
DC Bias Circuitry;
Yes
Check components
No
around Q3769, if
Yes
Check components
No
around Q3762, if
Yes
Figure 5-11. Low or No RX Injection Signal (136–174 MHz)
replace if
necessary
OK replace
Q3769
OK replace
Q3762
5-21
AEPF-27810-O_VHF
May 25, 2005
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